Fast Blue B

Property Data Common name Suggested name Other names C.I. number C.I. name Class Ionisation Solubility aqueous Solubility ethanol Absorption maximum Colour Empirical formula Formula weight Fast blue B Fast blue B – 37235 Azoic diazo 48 Diazonium salt – 10% – 371 Yellow – 475.49

Fast blue B is a diazonium salt which has been recommended as a coupling agent in a technique which demonstrates aldehydes. 2-hydroxy-3-naphthoic hydrazine is applied to sections in which aldehydes have been generated by some means. The resulting complex then reacts with fast blue B forming a blue violet azo dye.

 

Reference
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Burstone, M.S.
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